supporting science, technology, and improved economic performance and financial literacy in the 21st century. and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> brown: the downfall of david petraeus showed no sign of fading into the background today. instead, there was every indication that his admission of adultery will echo far beyond the end of his career at the c.i.a. >> a personal scandal forces c.i.a. director david petraeus to... >> i want to start out with this out of the blue thunder bolt that hit washington friday. >> brown: all weekend in washington the details kept coming along with more questions. after david petraeus' sudden resignation on friday because he had had an extra marital affair quickly revealed to involve his biographer paula broadwell. her book came out last january. appearing on c-span she recalled first meeting petraeus several years earlier. >> he came to harvard university where i